Bureau County, IL Insulation Payback
Bureau County attic insulation, by the numbers
Bureau County, Illinois is zone 5 under DOE's climate map (Cold), which means cold enough that heating, not cooling, is what decides the bill. An uninsulated attic there should be built up to R-60. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $1,850 a year — payback in roughly 1.9 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,712 a year on the heating side, $138 on cooling. By estimated insulation savings, Bureau County lands in the 75th percentile nationally. Zone 5 alone covers 745 counties in this dataset, and Bureau County comes in 206th by savings. Illinois averages $1,642/year across the counties tracked here; Bureau County comes in 13% higher.
Bureau County's actual weather, not a national average
NOAA's PRINCETON, IL US station, 4.7 miles from Bureau County, supplies the 6,401 HDD and 860 CDD this estimate runs on. By total degree days, Bureau County sits at the 76th percentile nationally. One local detail the R-value alone won't tell you: Bureau County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
A shallower starting point changes the math: with R-11 already down, only the gap to R-49 needs filling, at roughly $2,280 for an estimated $270/year saved (~8.5-year payback). Call this borderline rather than a clear win.
Quotes and materials for this job
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Bureau County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Bureau County's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.